Ring-joint machine



SePLlS, 1928;

EVANS RING JOINT MACHINE ark-meg Sept. 18, 1928. 1,684,760 w. L. EVANS RING JOINT MACHINE Filed Nov. 10, 1926 4 Sheets-Sheet 2 Ill-111mm 2 ill Witnesses ail owing I Sept. 18, 1928. 1,684,760

w, L. EVANS rune JOINT MACHINE Filed Nov. 10. 1926 '4 Shets-Sheet 3 Qxwmeomo M Sept. 18, 1928.

W. L. EVANS RING'JOIN'I. MACHINE 4 Sheets-Sheet 4 Filed Nov. 10, 1926 H11! h|||l 2% Qmimcooeo I I Patented Sept. 18, 1928.

UNITE" STATES WILLIAM LEWIS EVANS, OF WASHINGTON, INDIA-NE" RING-JOINT MACHINE.

This invention relates to arin-g' joi nt machine, adapted to be used in joining trim, molding, or other material, by what is-hno'wn as a ring joint. In making this type of joint, after the pieces to be joined are cut in the proper shape, channels or grooves are cut: in their-rear faces, in such a manner as to form a continuous circular channel when the pieces are properly joined. lVhil'e the pieces are clamped in this position, a ringis forced into this channel, andthis ring is of such a size and shape that it will exert a forceful gripping action against the inner Wall of the channel and hold the joint tightly together.

The construction of the present invention is: similar in some respects to that shown in my earlier pplication, Serial No. 52;H5, filed August 25,1925. but has been considera'liliy modified with the object of obtaining simplicity of construction and operation, as well as lightness'and compactness, and economy in production. The production of joints with the present machine may be a little slower than with the former machine, but this loss of time is almost negligible when compared with the saving in capital invest- .inent, and the low cost of upkeep. This advantage: is. more apparent, when it is noted that the operator of the present machine need not'bie askilled machinist.

The specific construction of the present invention, together with its objects'and adv'antages,will be more fully explained in connection. with: the accompanyingdrawings, whiehi illustrate the same in. its preferred format. a

In] the drawings Figure; I isa side elevation of the machine.

Figure 2: is a. front elevation thereof.

Fi he 3 is a rear elevation thereof.

Figure 4 is a vertical longitudinal section taken substantially centrally of the machine.

Fignrre is a plan. view of the work. table andthe cutter, the adjacent part of the frame being. shown in section.

figure 6. is a detail view of the bracket for pos' ioning' the: work, and the means for adjusting; the same.

re: *5 is a detail. sectional view showing actual. no; the same. I

Figure 8 isa. section taken-z on the hneS-S the fan and its housing.

Application filed November 1 0, 1926i Serial N02 147,529.

secured Mounted for sliding: longitudinal adjustment on: this table is: a gage bracket 8, the" shape of which will depend upon the character of the join to be formed. In the present instance, I havesh'own a: brac liet used formaki'ng corner oints, and. having a rightan-gular seat 9 againstwhich rest the ends of the two pieces to be joinedi The bracket is formed with a rearward l-y projecting 1 socket 1K); in which a guide rod 11 is-seoured.

rain 12. is used for clamping the work to the table 7 while the circular channel is being out, aswetl asfor forcingthering' into the channel: forcompletingf the joint. This ram 12 is supported in an: overhanging head 1 3 WllIGlfll constitutes: an lntegral part of' the frame The is removably secured to a; stem 1%, which is guided. for verticat move ment. in a guideway 15v formed in the: head A number of interchangeable rams may be provided of different sizes; Thestenr 1.4 is formed: on. one side with rack. teeth 16, which engage with: the teeth ofai pinion 127,

adapted to be rotated to") raise: or. lower the In. the: present: construction-,.. imorder' to simplify the. IIELG'GlIQMi'SIIL. the pinion. L7 is driven: from: a horizontal shaft 18', mounted in the headwlB in rear! of the. stem 114 and adapted to be: rotated by means of a. hand wheel 19' secured. to one: end thereof; Amy.

approved form of speed reductiomgearinig may used to connect the: shaftv 18150 the pinion In the constructionishown, the head; 13 18: extended. at one: side; to am a gear housing 20,. which is; provided with: a removable cover piaite 21.. 'The shaft l8extends into this: housing, and; the pinion 197 is formed with. a hub 22, which also extends into the: housing. and. a: gear? 23 keyed to; the lrub: 22? is: driven by a; pinion 24, keyed to the-extended portion of theshaft. 1-8..

hen: the two: pieces to: be joined have: been placed upon, the table '3, against theseat' 9, v

the ram 12 is lowered to clamp the work to the table, and a circular channel is cut in the bottom face of the work thus held by means of a cutter 25, secured to the upper end of a vertical shaft 26. This shaft is slidably, as well as rotatably, mounted in a bearing 27 in the front part of the frame 1,, and the shaft, while rotating, may be raised to bring the cutter 25 into contact with the wood. The bearing 27 is lubricated by means of a grease cup 28.

The shaft 26, extending downwardly below the frame 1, has a pulley 29 secured thereto, which is connected by a belt 30 to a pulley 31, driven by an electric motor 32. This motor is secured by studs 33 to a plate 34, constituting part of the rear portion of the frame 1. This plate 34 is provided with various holes .35, properly spaced to meet the requirements of different types of motors,

which may be used for driving the cutter.

The vertical movement of the shaft 26 1s controlled by means of a pedal 36, which may be conveniently fulcrumed intermediate its ends on the front tie rod 5. The pedal 36 is pivotally connected at its rear end, as at 37,

to the lower end of a link 38, which is connectedat its upper-end, as at 39, to a thrust collar 40, mounted on the shaft 26 beneath the pulley 29, and held on the shaftby a retaining collar 41. The pedal 36, in front of its fulcrum, carries a pin 42, to which is connected a stop rod 43. This stop rod projects upwardly through a flange at the front edge of the frame 1, and is provided at its upper end.

and at the'sametime draws the thrust collar 40 and the cutter 25 downwardly. Thelimit of this retrac-tive movement is determined by an adjustable screw 46, mounted in the lower port of the link 38and engageable with a shoulder 47 formed on the rear part of the pedal 36.

In order to remove the chips and shavings as fast as they are cut, a fan 48 is secured to the shaft 26 immediately beneath the cutter 25, and the housing 6 which surrounds the cutter. The fan is formed with an outlet 49 through which the shavings are blown.

'In order that the machine may be used for making joints of different sizes, corresponding to different widths of molding, a number of cutters 25 of different sizes may be interchangeably used, and'the table 7 is likewise formed with a number of openings 50, corresponding to the different sized cutters. The table is, therefore, mounted for circumferential adjustment about a central pin 51, secured in the frame adjacent the housing 6, and the various positions of the table about the central pin 51 may be determined by a springheld pin 52 mounted in the front part of the housing 6, and engageable with any one of a plurality of recesses 53, formed in the downturned edge of the table. The table 7 has one side without a hole 50, which is brought beneath the ram when the rings are to be forced into place. 7 s

In order that the stock may be placed in proper position for cutting the channel and for applying the ring thereto, the gage bracket 18 is guided and adjusted by means of the rodll, which is mounted in side flanges 54, formed on the rear part of the frame. This rod is provided with two collars 55, which can be adjusted longitudinally of the rod and secured by means of set screws 56.

A keyway 57 is provided on the rod for receiving the points of the set screws, so as not to scar the rod when changing their positions. A flat spring 58 is securedto the frame. behind the rod 11 to hold the collars in position; In joining casings of considerable width, it is desirable to use two rings. In such case, the collars may be set so that one collar engages the spring to hold the bracket 8 in position for cutting one channehand the gage may then be shoved back, causingthe collar to override the spring, and allowing the other collar to engage the spring to hold the bracket in position for cutting the second channel. In other words, the collars 55 and spring 58 provide an adjustment which will hold the stock in either of two positions, depending on whether the gage bracket is pulled out or pushed in.

In the operation of the machine, after selecting a cutter 25 and'a ram 12 of the proper 3 size for the stock which is to be Worked upon, the table 7 is adjusted so that the hole' 50,

which is over the cutter, will be of a size cor responding to the size of the,cutter. The gage bracket 8 is then adjusted to proper position. The two pieces to be joined are placed upon the table, and the ram 12 is lowered to clamp them in position. The pedal 36 is then depressed to raise the cutter 25 into contact with the wood. The nut 44 on the stop rod is adjusted so that when the pedal is depressed as far as possible, the channel will be cut to the proper depth. Afterthe channel has been cut, the work is turned "over, and a ring is forced into the channel by means of the ram 12, which is madecupshaped for this purpose. By using a suit able type of speed reduction gearing in the housing 20, a tremendous force may be applied to the-ram by means of the hand wheel 19. For further details in regard to the method of applying the ring to the channel,

(ill

- nee-agree and in regard to the various typeof rings which may be used, reterence may behad to my ce pending application above mentlZOl'IGtl.

It will be noted that machine constructed according to the present invention has comparatiycly' few parts which can get out of order. The operation of the machine is very simple, sothat even a novice will find no diiiicu lty in using it. The cost of manutactu-re isalso comparatively small, yet it is capable of procu-cing joints which are identical in every respect with those which can be produced by more expensive machines. l i l i-i-l'e' l have shown and described specifically one form in whicl'r the invention may be embodied, it is tobe understood that various ations may be'made in the structural tl'iereot' without any material departu-re from the salient features of the invention expressed in the claims.

What is claimed is 1'. In a woodworking machine the combination of a frame; a table supported on the frame; means for holding the worlr on the table a rotatable cutter beneath the table; means for projecting the cutter into engagement with the underside of the work; said table having a plurality of holes of different sizes corres iiondingto the cutters which may be used,-thetable being movable to align any one of the holes with the cutter.

2. In a woodworking machine, the combination of a frame; atable mounted on the frame; arotatable cutter beneath the table;

said table having a plurality of holes of different sizes corresponding to the sizes of the cutter" which may beused; the table being movable to align any one of the holes with the cutter; adjustable guide means to posit-ion the work on the table above the aligned hole; clamp means to hold the work so positioned; and means to project the cutter through the aligned holes and into engagement with the underside of the work.

3. In a ring joint machine, the combination of a frame having a lower arm with a table supported thereon, an upper arm rigidly connected to the lower arm and terminating in a head which overhangs the table, a ram supported by said head, means for moving said ram into engagement with stock supported on the table, a cutter rotatable about a vertical axis beneath the table, said table being rotatably adjustable about its center and having various holes of ditierent size corresponding to various cutters which may be used, means for latching the table with any one of the holes above the cutter, and means for projecting the cutter through the selected hole into engagement with the stock supported by the table.

4. In a ring joint machine, the combination of a frame, a table supported by the frame, a ram mounted above the table and adjustable into engagement. with stock supported: thereby, a ring channel cutter supported beneath the table, said table having a: plurality of holes of different size corresponding to var rious cutters which maybe used, means for 'adjustably latching the. table so that any one of theholes is above thecutter', and means for projecting the cutter through theselected hole into engagement with the: stock sup ported by the table.

5. In a ring joint machine, the combination of a frame having a lower arm. with a table supported thereon, an upper arm rigidly connected to the lower arm and terminating in a head which overhangs the table, a ram supported by said head, means for moving said ram into engagement with stock supported on the table, a ring channel cutter rotatable about a vertical axis beneath the table, said table being rotatablzy adjustable about its center and having various holes of different size which may be brought into position above the cutter and which correspond to cutters of different size which may beused, said table having one side'which is impertorate and adapted to be positioned beneath the ram when the latter is used to apply the ring to the joint, and means for projecting the cutter into engagement with the stock supported by the table when the latter is properly positioned to receive the same.

6. 111 a ring joint machine, the combination of a frame, a table supported by the frame, a ram mounted above the table and adjustable into engagement with stock supported thereby, a ring channel cutter supported beneath the table, said table being rotatably adjustable about its, center and having various holes of different size which may be brought into positionabove the cutter and which correspond to cutters of different size which may be used, said table having one side which is imperforate and-adapted to be positioned beneath. the ram when the latter is used to apply the ring to the joint, means for projecting the cutter into engagement with the stock supported by the table when the latter is properly positioned to receive the same, and means for adjustably latching the table in any one of the various positions in which it is to be used.

7. In a ring joint machine, the combination of a frame, a Work table supported thereby, a ram supported above the table and movable into engagement with stock supported thereon, a gage bracket resting on the table,

a guide rod secured to and extending rearwardly from said bracket, said frame having flanges with holes in which said rod is slidable longitudinally, a spring on the frame between said flanges, and a pair of stop collars adjust-ably secured on the rod between the flanges and cooperable with the flanges and spring to gage the bracket in either one of two predetermined positions.

8. In a ring joint machine, the combination of a frame, a work table supported thereby, a ram supported above the table, manually operable means .to move said ram into engagement with stock supported. by the table, a rotatable vertical shaft mounted in the frame beneath the table, a cutter secured to the upper end of the shaft, power-operated means for constantly rotating said shaft and cutter, means for raising said shaft, while it is rotating, to cause the cutter to act on the stock supported by the table, agage bracket resting on the table, a guide rod secured to and extending rearwardly from said bracket,

; said frame :having flanges with holes in which said rod is slidable longitudinally, a spring mounted on the frame between said flanges, and apair of stop collars adjustably secured on the rod between the flanges and cooperable with the'flang es and spring to gage thebr'acket in either one of two predetermined positions.

9. In a ring joint machine, the combina tion of a'frame, a work table supported thereby, a ram supported above the'table, manually operable means to move said ram into engagement with stock supported by the table, a rotatable vertical shaft supported beneath the table, a cutter secured to the upper end of the shaft, means secured to the shaft below the table for driving the same, a thrust collar on the shaft below the driving means, a pedal fulcrumed on the frame, a link pivotal-- y connected at one end to the thrust collar and at the other'end to the pedalin rear of its fulcrum, so that a depression of the front end of the pedal serves to raise the cutter, while rotating, into contact with the stock supported by the table, a spring connecting the link to the pedal in front of its fulcrum to restore the cutter shaft and pedal to initial position after the pedal is released, co-engaging stop means on the link and pedalrespectively, including a shoulder formed on one of these members and an adjustable screw ,on the other member to adj ustably limit the normal retractive movement of thecutter, and stop means connected with the pedal in front of its fulcrum to limit the V upward movement of the cutter shaft.

10. In a ring joint machine, the combination of a frame, a work table supported thereby, means for clampin stock to the table to be worked upon, a rotatable vertical shaft supported beneath the table, a cutter secured to the upper end of the shaft, means secured to the shaft below the table for driving the same, a thrust collar on the shaft below the driving means, a pedal fulcrumed on the frame, a link pivotallv connected at one end to the thrust collar and at the other end to the pedal in rear of its fulcrum, so that a depression of the frontend of the pedalserves to raise the cutter into contact with the stock supported by the table, a contractile coil spring connecting the link to the pedal in front of its fulcrum to restorethe cutter shaft andpedal to initial position after the pedal is released, and co-engaging stop means on the link and pedal respectively to limit the retractive movement. 7 I

In testimony, that I claim theforegoing as my own, I have hereto affixed my S1gna ture. 

